samsung note screen unlock

had a samsung note that was setup with an Exchange email account. the screen unlock settings was greyed out after activating the account. read some link from below. just want to confirm if definitely there was no workaround for this scenario?

This video shows how to remove a single email address from the Outlook 2010 Auto Suggestion memory.
NOTE: For Outlook 2016 and 2013 perform the exact same steps.
Open a new email: Click the New email button in Outlook.
Start typing the address: …

Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…